<form class="form-horizontal well" role="form">
        <div class="form-group">
            <label class="col-sm-1 control-label">名:</label>
            <div class="col-sm-4">
                <input type="text" class="form-control" placeholder="first name" data-bind="value: firstName,valueUpdate: 'afterkeydown'">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">姓:</label>
            <div class="col-sm-4">
                <input type="text" class="form-control" placeholder="last name" data-bind="value: lastName,valueUpdate: 'afterkeydown'">
            </div>
        </div>

        <div class="form-group">
            <div class="col-sm-offset-1 col-sm-4">
                <h3 class="text-center">你好, <span data-bind="text: fullName"> </span>!</h3>
            </div>
        </div>
</form>
